Metallized Film Capacitors Manufacturers

AnHui JuanKuang Electric Co., Ltd. has manufactured film capacitors in Ningguo City, Anhui Province since 1995, and we metallize the polypropylene film ourselves before winding it into finished components. As an established Metallized Film Capacitors Manufacturers, we supply CBB-series capacitors for motor run and start circuits, lighting gear, microwave oven high-voltage sections and power electronics — in standard ratings and in OEM/ODM builds produced from customer drawings or samples.

The range covers the duties where a dry, self-healing film capacitor replaces electrolytic or paper types: single-phase motor starting and running, compressor and fan loads in appliances, HID lighting circuits, microwave oven transformer supplies, low-voltage power factor correction, and DC-link or AC/DC filtering on inverter boards. Capacitance, rated voltage, case dimensions and packaging are all built to the application.

• Founded 1995; more than 30 years concentrated on film capacitor production
• 53,000 m² production site and a 2,000 m² R&D and testing centre
• Annual output of 40 million capacitors; annual export volume above 10 million units for air conditioner and refrigerator compressor capacitors
• ISO 9001 and ISO 14001 certified, with UL, VDE, CE and CQC product certifications

Film, winding, assembly and test in one chain

Our Ningguo factory keeps the whole sequence in-house, so metallized film, wound sections, end-sprayed elements and finished capacitors stay under one quality system rather than moving between subcontractors.

• Metallized film production — polypropylene film metallized on German coating equipment
• Winding — Swiss fully automatic winding machines for repeatable section geometry
• Welding and spray coating — automated contact welding and end spraying for solid terminations
• Assembly — plastic, aluminium, stainless steel and oil-filled case formats
• Testing and logistics — automated electrical test and a dedicated warehousing and dispatch area

Because the film is coated on site, metallization resistance, margin width and film width can be adapted together with the winding programme when a customer design needs a different balance of ripple capability, self-healing behaviour and case size.

Our metallized film capacitor range

Matching the family to the application

A single appliance platform often needs two or three of these families at once — for example a CBB65 compressor capacitor, a smaller fan capacitor and a filter capacitor on the control board. We quote them as one coordinated set so the terminals, marking and carton configuration stay consistent across the production line.

Dielectric, case and termination choices

Metallized polypropylene is our base dielectric across the CBB series. It gives favourable high-frequency behaviour, temperature stability, strong self-healing under transient breakdown and a compact footprint compared with older film and paper constructions.

• Case material — plastic cylinder, aluminium cylinder, oval aluminium, square plastic, stainless steel and oil-filled cans, selected by thermal load and mounting space
• Impregnation — dry-type designs for appliance and PCB duty; oil-filled designs for heavier AC filter duty
• Terminations — PCB pins on the filter and DC-link range, terminal arrangements suited to harnesses and busbars on appliance and power builds
• Safety behaviour — self-healing metallization plus over-voltage protected constructions on the square power capacitor types

We confirm the case and termination combination against the customer drawing, because a change of can format usually changes the thermal path and therefore the permissible ripple current.

Specification scope we build to

Capacitance precision of 1% or better is achievable where the circuit requires it, and the family operates across a wide frequency span, from mains-level tens of hertz up to hundreds of megahertz in filter and pulse duty. Long-term stability and temperature stability are the design targets that govern film selection and winding tension.

• Capacitance and tolerance band, including tight-tolerance requests
• Rated AC or DC voltage, with harmonics included in the applied stress calculation
• Ripple current and duty cycle at the expected switching frequency
• Ambient and case temperature, including elevated-temperature lighting and appliance environments
• Insulation resistance, dissipation factor and voltage proof requirements agreed per part number

The working point is checked before a part number is released, so a request for a given microfarad value is translated into the film thickness, section geometry and metallization resistance that will actually hold that value over life.

Quality control, compliance and acceptance

Standardized production management runs from incoming material inspection through process parameter control, in-line inspection, semi-finished testing, finished product inspection and shipment quality control. Finished capacitors are 100% inspected against customer requirements and international standards before packing.

• ISO 9001 quality management and ISO 14001 environmental management systems
• UL, VDE, CE and CQC product certifications supporting access to North American and European markets; CBB65 AC motor capacitors hold VDE certification
• RoHS, REACH, TSCA and POPs compliance for product materials and packaging
• More than 90 patents, including 16 invention patents, and participation in drafting the GB/T 3667.1 AC motor capacitor national standard
• 2,000 m² R&D and testing centre used for type testing, endurance work and new-product qualification

For project acceptance we agree the inspection items, sampling plan, test voltage, capacitance and loss limits and marking content with the customer before mass production, and the same criteria are applied to the pre-shipment inspection record.

OEM/ODM configuration and project support

Custom production is core work for us, not an exception. Capacitance, voltage, dimensions and packaging can be customized, and we develop parts from customer drawings, samples or a described working point. Our technical centre handles the film selection, winding trial, prototype build and verification sequence before a line trial is authorized.

Samples are released against the agreed drawing, and drawings, inspection records and certificate copies are issued with the shipment so incoming inspection at the customer plant can be planned in advance. Production has supported appliance and electrical brands including GE, Electrolux, Samsung and Whirlpool, with exports to more than 30 countries across North America, Europe, Southeast Asia and the Middle East.

Installation, handling and serviceability

Metallized film capacitors are robust components, but several installation points determine whether the rated life is reached in service.

• Discharge the capacitor through a suitable resistor before handling or measurement; do not rely on a short circuit alone
• Keep terminal torque and lead bend within the values agreed on the drawing to avoid stressing the end-spray contact
• Support the case body, not the terminals, and respect the mounting orientation used during type testing
• Allow airflow around grouped power capacitor banks so case temperature stays inside the designed limit
• Store in a dry, moderate environment and keep leads formed until the assembly step
• Replace rather than repair a capacitor that has operated through a fault event or visible case deformation

Information We Use to Configure Your Solution

A proposal is prepared from the electrical working point and the mechanical interface, not from a capacitance value alone. The following inputs let us select the film, section, case and test regime in one pass.

• Electrical: capacitance and tolerance, rated AC or DC voltage, frequency, expected ripple current, harmonics and duty cycle
• Environment: ambient and case temperature, humidity, altitude, vibration and indoor or outdoor installation
• Mechanical: case format and envelope, terminal type and position, mounting bracket, lead length, clearance to adjacent parts
• Life and safety: target service life, switching cycles, protection scheme, applicable safety standard and market-access requirement
• Interface and marking: harness or PCB footprint, marking text and language, label placement
• Volume and logistics: annual and release quantities, packaging format, carton marking, destination and trade terms
• Documentation: drawings, sample quantity, inspection report, certificate copies and any customer-specific test items

Send a drawing, a sample or a written duty description and we will return a configuration and quotation, normally within 12 hours of receiving the enquiry.

Frequently asked questions

Which metallized film capacitor types does JuanKuang manufacture?

We manufacture AC motor capacitors for washing machines, air conditioners, fans and refrigerators, lighting capacitors, high voltage microwave oven capacitors, and power capacitors for PFC, filtering, DC-link and pulse duty. Metallized polypropylene film from our own coating line is also supplied to other capacitor producers.

Can you build a capacitor to our drawing or sample?

Yes. Custom production is our core business, and capacitance, voltage, dimensions and packaging can all be adapted. We work from the customer drawing, a physical sample or a described working point, then confirm the winding, case and test plan before a production run.

Which certifications support entry into North American and European markets?

Our products carry UL, VDE, CE and CQC certifications, and the company operates ISO 9001 and ISO 14001 management systems. Product materials and packaging comply with RoHS, REACH, TSCA and POPs requirements, which covers the document set normally requested at customs and at incoming inspection.

How is quality verified before shipment?

Inspection is applied after each process step, and completed capacitors are 100% inspected against the agreed specification and international standards. Where a project needs defined acceptance testing, the inspection items and sampling plan are agreed before mass production and reported on the shipment record.

What do you need in order to quote a motor run capacitor?

Send capacitance and tolerance, rated voltage and frequency, ambient temperature, required case format and dimensions, terminal type, expected annual and release quantities, packaging and marking requirements, plus the safety standard the part must satisfy. With those points we can confirm the construction, sample plan and price.

Do you supply metallized film separately from finished capacitors?

We do. Metallized polypropylene film is produced on the same coating line used for our own capacitors and can be supplied slit to width, with the metallization pattern and surface resistance selected for the customer's element design.